DOS ain't dead

Free Pascal 3.0.2 - external linker? (Announce)

posted by marcov, 29.03.2017, 13:08

> "FPC -Xi test.pas" makes binary which is not compatible with UPX.
> "FPC -Xe test.pas" produces binary which has no problem with UPX.


Clear, so it is internal linker vs external linker.


> No parameter or -Xi parameter calls own FPC linking code. So it shows that
> this incompatibility has nothing to do with DJGPP 2.05 incompatibility,
> resp. Binutils 2.23.2 incompatibility (which can be observed f.e.
> here)

The point was that the incompatibility was only with UPX, not DJGPP or its utils itself.

> I suspect some change in the OGCOFF.PAS file in \COMPILER subdirectory
> The change was done after FPC 2.6.4 which is after March 2014
> http://svn.freepascal.org/cgi-bin/viewvc.cgi/trunk/compiler/ogcoff.pas?view=log
>
> It seems that UPX checks the COFF header very strictly and rejects all
> deviations.

The whole dos internal linker is post 2.6.x afaik. And I wouldn't call it strictly, but merely a subset hacked till it worked with DJGPP.

This has happened before, *nix derived tools are hardly tested with anything else than what gcc supports. Often (like here) not even attempt was made to support the standard fully.

Complete thread:

• Freepascal 3.0.2rc1 - Laaca, 30.12.2016, 23:54 (Announce)
  • Free Pascal 3.0.2 (rc1) - Rugxulo, 08.01.2017, 20:14
    • Free Pascal 3.0.2 (rc1) - marcov, 12.01.2017, 15:23
      • Free Pascal 3.0.2 (final?) - Rugxulo, 23.02.2017, 16:17
        • Free Pascal 3.0.2 (final?) - marcov, 27.02.2017, 13:06
          • Free Pascal 3.0.2 (final?) - marcov, 27.02.2017, 14:03
            • Free Pascal 3.0.2 - Rugxulo, 28.02.2017, 19:15
              • Free Pascal 3.0.2 - marcov, 01.03.2017, 11:34
                • Free Pascal 3.0.2 - Rugxulo, 02.03.2017, 22:17
                  • Free Pascal 3.0.2 - marcov, 03.03.2017, 15:56
                    • Free Pascal 3.0.2 - external linker? - Laaca, 24.03.2017, 21:13
                      • Free Pascal 3.0.2 - external linker? - marcov, 28.03.2017, 10:21
                        • Free Pascal 3.0.2 - external linker? - Laaca, 28.03.2017, 22:59
                          • Free Pascal 3.0.2 - external linker? - marcov, 29.03.2017, 13:08
                    • Free Pascal 3.0.2 - bug in the PTC library - Laaca, 07.04.2017, 01:51
                      • Free Pascal 3.0.2 - bug in the PTC library - marcov, 09.04.2017, 13:36
                        • Free Pascal - May 2017 SourceForge.net Project of the Month - Rugxulo, 05.05.2017, 10:18
                          • Free Pascal - May 2017 SourceForge.net Project of the Month - marcov, 06.05.2017, 17:48
              • Free Pascal 3.0.2 - Rugxulo, 01.04.2017, 23:01